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Quercus phellos - Liquidambar styraciflua / Claytonia virginica Floodplain Forest | NatureServe Biotics 2019
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Name: Quercus phellos - Liquidambar styraciflua / Claytonia virginica Floodplain Forest Reference: NatureServe Biotics 2019 Description: This association is restricted to a discrete area of the Potomac River floodplain at the downstream end of the Potomac Gorge in the District of Columbia. It occupies the interior part of the floodplain adjacent to the C&amp;O Canal. Soils are quite rocky, with bedrock frequently exposed. Soils are a gravelly silt loam or loam, and the mean flooding recurrence interval for this site is approximately 14 years. The vegetation is a closed forest strongly dominated by large and apparently even-aged <i>Quercus phellos</i>. <i>Liquidambar styraciflua</i> is frequent in the subcanopy and is second in abundance in the tree layer. <i>Acer negundo</i> and <i>Nyssa sylvatica</i> are also frequent in the subcanopy. Other bottomland and some upland trees occur as minor associates, including <i>Acer rubrum, Carya cordiformis, Fraxinus americana, Fraxinus pennsylvanica, Liriodendron tulipifera, Quercus bicolor, Quercus palustris</i>, and <i>Ulmus americana</i>. The shrub layer cover is open to moderately dense with <i>Viburnum prunifolium</i> most abundant. Woody vines are moderately important at 5% cover. The herb layer is quite diverse but heavily dominated by invasive exotics, including <i>Microstegium vimineum, Alliaria petiolata, Lonicera japonica</i>, and many others. Small remnant populations of native herbs such as <i>Allium canadense, Amphicarpaea bracteata, Arisaema triphyllum</i>, and <i>Claytonia virginica</i> are consistent with a well-drained floodplain.  Accession Code: urn:lsid:vegbank.org:commConcept:35126-{D7E08C90-98BD-46AD-A0B2-E5ABC36B919E} Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 31-May-2007 to: ongoing
	status: accepted Community's Parent: Quercus phellos - Quercus nigra Coastal Plain Floodplain Forest Alliance This Community's Level: Association This Community's Children: [none]		Names:   UID: ELEMENT_GLOBAL.2.802087 NatureServe Explorer   Code: CEGL006494   Translated: Willow Oak - Sweetgum / Virginia Springbeauty Floodplain Forest   Common: Potomac Gorge Willow Oak Floodplain Forest   Scientific: Quercus phellos - Liquidambar styraciflua / Claytonia virginica Floodplain Forest (convergence) and Synonyms: (similar) Quercus phellos - Liquidambar styraciflua / Claytonia virginica Forest